Anchor



E. W. KAISER Jan. 27, 1959 ANCHOR Filed Sept. 19, 1955 INVENTOR. [award W [562160;

United States Patent C) ANCHOR Edward W. Kaiser, Chicago, 111.

Application September 19, 1955, Serial No; 535,059 3 Claims. 01. 285-133) This invention relates, generally, toanchors and it has particular relation to anchors for, securing the inner pipe of anconduit system against longitudinal movement relative to outer casings surrounding the-same. Such a system is shown in U. S. Patent No. 2,658,527, issued November 10, 1953. v

Among the objects of this invention are: To provide for simply and efliciently securing the inner pipe of a conduit system against longitudinal movement relative to outer casings surrounding it while permitting the inner pipe to rotate relative to the outer casings; to secure to the inner pipe an anchor plate which extends radially therefrom only to the periphery of the casings and to surround such anchor plate with an anchor flange of the same thickness which is secured in fluid tight relation between flanges extending radially from the juxtaposed ends of the casings; and to manufacture both the anchor plate and the anchor flange from a single flat plate.

Other objects of this invention will, in part, be obvious and in part appear hereinafter.

This invention 'is disclosed in the embodiment thereof shown in the accompanying drawing and it comprises the features of construction, combination of elements and arrangement of parts that will be exemplified in the construction hereinafter set forth and the scope of the application of which will be indicated in the appended claims.

For a more complete understanding of the nature and scope of this invention reference can be had to the following detailed description, taken together with the accompanying drawing, in which:

Figure 1 is a view, partly in side elevation and partly in section, showing the first step in the assembly of an anchor in a conduit system in accordance with this invention;

Figure 2 is a view, in side elevation, of the juxtaposed ends of the casings for the system shown in Figure l and illustrating the next step in the assembly;

Figure 3 is a view, in side elevation, showing the third step in the assembly;

Figure 4 is a view, in side elevation, of the assembled joint between the casing sections with the anchor flange and anchor plate in position; and

Figure 5 is a view, in end elevation, of the anchor and surrounding anchor flange.

Referring now particularly to the drawing, it will be observed that the reference character in Figure 4 designates, generally, a portion of a conduit system such as that disclosed in U. S. Patent No. 2,658,527, issued November 10, 1953. As shown in Figures 1 and 2, the system includes an inner pipe 11 which may be employed to carry steam, hot water, or the like, and which is to be mounted in insulated spaced relation within casings 12. It will be understood that the inner pipe 11 can be a steel pipe and that the cylindrical casings 12 can either be of steel or cast iron. Preferably a length of inner pipe 11 and a casing 12 comprise a unit with the pipe 11 projecting from the ends of the cylindrical casing 12 a few 2,871,035 Patented Jan. 27, 1959 ice inches in order to facilitate assembly. The inner pipe 11 is spaced suitably from its cylindrical casing 12 and is surrounded by a layer of insulation 13 the outer surface of which is spaced from the inner surface of the cylindrical casing 12 in order to provide a continuous passageway therebetween. At the ends of the cylindrical casings 12 radially extending flanges 14 are positioned. They may be secured to the casings 12 as by welding, indicated at 15. vIn the event that the casings 12 are formed of cast iron, the ends are threaded and the flanges 14 are threaded thereon. As shown, the flanges 14 are flush with the ends of the respective cylindrical casings 12.

In order to control the relative expansion and contractionof the inner pipe 11 with respect to the outer casings 12, it is desirable to anchor the former against relative longitudinal movement with respect to the latter at spaced locations therealong. For example, in a run of 500' of pipe, it may be desirable to anchor the inner pipe 11 at the intermediate position or 250 from either end. However, it is desirable to permit slight rotary movement of the inner pipe 11 relative to the outer casings 12. For this purpose an anchor plate 18, shown more clearly in Figure 5, is employed. The anchor plate 18 has a central opening 19 for receiving therethrough the inner pipe 11. The anchor plate 18 is intended to bear against one or the other of the ends of the cylindrical casings 12 depending upon the direction of relative expansion or contraction of the inner pipe 11. Accordingly, the anchor plate 18 has a diameter, indicated at 20, which is the same as the diameter of the outer surface of the casings 12. In order to permit communication between opposite sides of the anchor plate 18 ports 21 and 22 are cut in opposite sides of the anchor plate 18, as shown.

Since the anchor plate 18 is arranged to bear against one or the other of the ends of the casings 12, and yet is to be free to rotate relatively thereto, it is necessary to space the radially extending flanges 14 apart sufficiently to permit such movement. For this purpose an anchor flange 23 is employed which surrounds the anchor plate 18 and preferably has the same thickness. Bolt holes 24 are provided around the anchor flange 23, as shown, for receiving through bolts that extend also through the flanges 14 for clamping the assembly in fluid tight relation.

The anchor plate 18 and anchor flange 23 preferably are formed from a single flat steel plate. A plate is selected of such size that the anchor flange 23 can be cut out of it by suitable cutting or burning devices well known in the art. The anchor plate 18 can be cut from the central portion of such a plate in like manner and the ports 21 and 22 are formed by suitable cutting or burning operation. Likewise, the central opening 19 is formed for receiving the inner pipe 11.

The anchor is assembled by first applying gaskets 25 about the protruding ends of the inner pipe 11 from the casings 12 as shown in Figure 1. Then the anchor flange 23 is positioned over one of the projecting ends of the inner pipe 11 and the anchor plate 18 is telescoped over the protruding end of the inner pipe 11 and is welded thereto as indicated at 26 in Figure 2. As here shown, the inner pipe 11 to which the anchor plate 18 has been welded is moved into its casing 12. It will be understood that the anchor plate 18 is welded onto the inner pipe 11 at a position close to the end of the insulation 13. Next the juxtaposed ends of the inner pipe 11 are welded together as indicated at 27 in Figure 2.

As shown in Figure 3 a section 28 of insulation is applied over the bared ends of the inner pipe 11 where they have been welded together as indicated at 27 in Figure 2. The joint is now complete and can be closed. This is accomplished by bringing the right hand cylindrical casing 12 to the-position shown in Figure 4 Where bolts 29- are inserted through the flanges 14, gaskets 25 and anchor flange 23 and are drawn up to provide a fluid tight joint.

Since the anchor plate 18 is coextensive with the ends of the cylindrical casings- 12 except for the ports 2'1 and' 22, it prevents relative longitudinal movement ofthe inner pipe 11, assembled as described, with respect to the'cylindrical casings 12; At the same time, since the anchorplate 18 is not heldagainst rotation, the inner pipe 11 is free to rotate about its longitudinal axis relative to the cylindrical casings 12. This reduces the strain set up on the system while at the same time preventing relative longitudinal movement between the inner pipe 11 and the outer casings 12 at the location ofthe anchor plate 18% Since certain further changes can be made in the foregoing construction anddifierent embodiments of the invention can be made without departing from the spiritand scope thereof, it is intended that all matters shown in the accompanying drawing and described hereinbefore shall be interpreted as illustrative and not in a limiting sense.

What is claimed as new is:

1. In a conduit system, in combination, cylindrical casings in end to end relation having radially outwardly extending flanges at the ends, an inner pipe extending through and spaced from the inside of said casings, an an- 2. In a conduit system, in combination, cylindrical casings in end to end relation having radially outwardly extending flanges at the ends, an inner pipe extending through and spaced from the inside of said casings, an anchor plate secured to said inner pipe and extending radially therefrom at least to the outer surface of said casings and interposed between said ends thereof to bear against the same on endwise expansion or contraction of said inner pipe, an anchor flange separate and distinct from said anchor; plate and surrounding the same and interposed between said flanges, said anchor flange having the same thickness as said anchor plate, gasketsbetween opposite sides of: said anchor flange and the juxtaposed sides of said flanges, and retaining means holding said flanges, said gaskets and said anchor flange in fluid tight relation.

3. An anchor assembly for preventing relative longitudinal movement between aninner pipe and cylindrical casings enclosing the same havingflanged ends While permitting relative rotation, between said pipe and casings comprising, in combination, an anchor plate adapted to.

References Cited in the file of this patent UNITED STATES PATENTS 2,184,183 Fykse Dec. 9, 1939 2,323,216 Goldschmidt June-29, 1943. 2,592,574 Kaiser Apr. 15, 1952 2,611,567 Williamson Sept. 23, 1952 2,658,527

Goldschmidt: Nov. 10, 1953 

